Belzona 4521 (Magma-Flex Fluid)

A fast-curing, 2-part flexible sealant designed to provide effective sealing of construction and expansion joints on concrete, stone, brick and other surfaces. This solvent-free material is a cost-effective and high performance alternative to …

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Stock Status: 500 pcs

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A fast-curing, 2-part flexible sealant designed to provide effective sealing of construction and expansion joints on concrete, stone, brick and other surfaces. This solvent-free material is a cost-effective and high performance alternative to conventional mastics and sealants, providing joints with up to 25% flexibility and outstanding weather and chemical resistance. It does not require any hot work and cures quickly, ensuring a safe and easy application.

Key benefits:

Provides expansion joint flexibility of up to 25%

Downtime reduction due to its fast-curing properties

Reduced future maintenance and eliminates the need for expensive structural rebuild

Reduced health and safety risks as it is solvent-free

Application and cure at room temperature - no hot work involved

Excellent weather and chemical resistance against a wide range of chemicals

Easy to mix and apply manually with no specialist tools required

Excellent adhesion to surfaces including concrete, brick, stone and steel

Applications for Belzona 4521 (Magma-Flex Fluid) include:

Expansion joints sealing on horizontal surfaces such as floors, bridges, roadways, car parks and manufacturing facilities

Sealing of leaking joints in secondary containment areas

Key technical data:

Working life at 20°C (68°F) 45 minutes

Time to mechanical cure at 20°C (68°F) 4 days

Peel adhesion (ASTM D421) 26 pli (460 kgs/m) on blasted steel

Volume capacity 1612 cm³ (98.4 cu.in.) per 2 kg

Bonds to Concrete, stone, brick, steel, other Belzona 4000 Series materials and many more

Typical applications Elastomeric expansion joint sealant

Unit size 2 kg. Pack sizes may vary locally.

Availability* Global

* All products are subject to regional restrictions. Check with your local Distributor for more information

More information:

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